茶花不长怎么回事？栀子花黄叶怎么回事？/What happened to Camellia japonica? What happened to the Gardenia leaves?

今日提问：茶花、朱顶红、月季、栀子花、风信子/Question of the day: Camellia japonica, Hippeastrum striatum, rose, gardenia, hyacinth